Flight Deal: U.S. to Spain from $325 Round-Trip

For travel between September and March 2019, flights to Spain are on super sale—like, 50-percent-off sale—but you'll need to pay attention to the airline. Flights from Boston, New York City, Miami, Charlotte, Phoenix, and even Los Angeles are as low as $325 round-trip to Madrid or Barcelona. But some are on budget airlines like Air Europa, Iberia's low-cost airline Level, and Norwegian, all of which only offer free carry-ons under 22 pounds and will charge you for a checked bag. Other flights—between $400 and $440 round-trip—are on full-service carriers like United, American, and Delta, and include one free checked bag.

If you're deciding between Madrid and Barcelona, check out our illustrated guide to the streets, styles, and foods that distinguish the Spanish cities from one other. Take your pick: Find Miró and Gaudí in the streets of Barcelona with the help of our new city guide or post up for a week in Madrid's Conde Duque neighborhood to really feel like an expat. If you want to get a two-for and visit both, a new high-speed train debuting in 2019 will cut down travel time between the cities to just three hours. (By car, it's at least double the time.)

How to book: Since you have your pick of airlines here, head to Google Flights to compare your options. Things to keep an eye out for: the airline (again, only book with low-cost airlines if you aren't paying planning on a checked bag—otherwise it's not worth the price) and the number of stops. (Some flights are non-stop, others have just one short layover, and a few have two stops. Don't book the two-stop flights, as they aren't worth the time.) Once you've found the best deal for your schedule and preferences, you can book with the airline of your choice. Note that the deal includes Thanksgiving but excludes travel around Christmas and New Year's Eve. According to Scott's Cheap Flights, who also spotted the deal, the fares can be expected to last for at least another day or two. Buena suerte.